norton



(No Model.) 3 Sheets-Sheet 1.

0. H. NORTON GRINDER.

No. 458,036. Patez nted Aug; 18, 1891.

- IN 1 v amocm foz 3 Sheets-Sheet 3;

(No Model.)

O.H.NORTON.

GRINDER.

No. 458,036. Patented Aug. 18, 1891.

UNITED STATES PATENT OFFICE.

CHARLES H. NORTON, OF DETROIT, MICHIGAN, ASSIGNOR TO THE LELAND,FAULCONER & NORTON COMPANY, 'OF SAME PLACE.

GRINDER.

SPECIFICATION forming part of Letters Patent No. 458,036, dated August18, 1891.

Application filed January 27, 1891. Serial No. 379,261. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES H. NORTON, of Detroit, in the county ofVayne and State of Michigan, have invented a new and useful Improvementin Grinders, of which the following is a specification.

My invention consists in an improved grinder, hereinafter fullydescribed and claimed.

The machine from which the drawings were made is a double machinecontaining two emery-wheels carried on the ends of an arbor G; butone-half of the machine is omitted in the drawings, (being broken away,)and my invention is equally applicable to a single machine.

Figure 1 is a plan View. Fig. 2 is a vertical section on line a; 00,Fig. 1. Fig. 3 is asection on line a 2, Fig. 2. Fig. 4 is an elevationof the front end of the water-guard. Fig. 5 is a plan View with thebed-plate, stone, &c., removed. Fig. 6 is asection on line y y, Fig. 4;and Fig. 7 is an elevation of the front end of the forked lever with thewater-guard partly omitted to show the truing-roller.

A represents the base of the machine, con sisting of a hollow caststandard of suitable size and strength.

B represents a cast-iron water-pan, having a well T formed in the bottomthereof, and a plugged drain-opening p in the bottom of said well, andis secured on the top of standard A. For a double machine this pan B isapproximately pear-shaped, as indicated in Figs. 1 and 5, though theshape is not material and may be varied at will, and has two wells T.

U represents a water-trough lying in well T, large enough to freelyadmit the lower side of the stone, one end of which is pivoted at thepoint V to pan B, and 1) represents a lug on the side of saidwater-trough at its free end.

10 represents a bracket castin pan B and extending upward at the side ofwater-trough U.

or represents a lever fulcrumcd on bracket to by a pin WV, one end ofwhich extends under lug b on water-trough U, and theiother end extendsunder a set-screw R, by which it can be forced down or permitted torise, thus enabling the operator to raise or lower the free end ofwater-trough Uto different heights in the Water-pan.

0 represents a plate bolted in pan B, forminga partial top for thewater-well T therein and carrying the set-screw R, hereinbeforedescribed.

D represents a bed-plate having slots I I therein, through which passbolts J and K, by which said bed-plate is adjustably fastened in the panB. This bed-plate carries boxes F, in which rotate an arbor G, carryingon one or both ends a stone or emery wheel M. The arbor G is providedwith a cone-pulley G to receive the drivingbelt and permit variations inthe speed of the arbor. 6 5

L represents a Water-guard, which is bolted to bed-plate D back of thestone and rises over the stone so as to cover about half thereof, asshown in Fig. 2. At the upper part of this Water-guard the sides thereofwhich embrace the stone are curved inward toward the stone and upward toform troughs, (shown at Z, Figs. 2 and 3,) the object of these being tocatch and collect water which is thrown off from the stone and at theirforward ends. These troughs are connected with adischargespout n. p

f represents a forked rocking frame or lever pivoted by the pin 2' tothe forward end of the water-guard L. One end of lever f 80 has athreaded opening therethrough to receive the adj listing-screw e, bymeans of which the position of said lever may be varied, and it is alsoprovided with a counterweight m, the tendency of which is to raise theforked end of lever f away from the stone.

(1 rep resents a hard steel roller screw-threaded on its periphery,journaled on a shaft 10, carried in a forked end of lever f, and bymeans of adjusting-screw c this roller q can be pressed against the faceof the stone for the purpose of truing it when it becomes unevenly worn.In addition to this the roller q, in connection with the forward end ofthe water-guard, (to be hereinafter described,)

aids in preventing the stone from spattering out from the machine thewater which runs along the under side of water-guard L and drops on thestone under the forward end of said guard. Instead of falling upon thestone, [0O

such waterfalls upon the roller q and is distributed in a thin sheetover said roller, flowing off from the under side thereof instead ofbeing thrown off from the stone in drops.

0 represents the mouth of the water and roller guard, which is pivotedin the forked end of lever f on the pin g above the shaft k.

It represents a set-screw pivoted through the mouth 0, adapted toimpinge upon pivot 9, whereby the mouth 0 may be set at any desiredangle. This mouth 0 extends around in front of and below the roller q,passing; when in the position shown in Fig. (3 beyond the center of saidroller, and its lower part is provided with a water-opening d, the frontof which is cut away, as shown in Fig. 6.

I have found that when water is discharged at the front end of thewater-guard through a mouth whose opening is approximately radial withthe stone the air-current caused by the stone tends to cause said waterto spatter, and that when said mouth is formed as shown in Fig. 6,approximately tangential with the stone, the effect of the air currentsis to carry the water discharged from said mouth smoothly and quietlydown upon said stone without spattering, and therefore 1 form the frontside of the mouth of the passaged as shown in Fig. 6, so as to form anacute angle with the periphery of the stone and approximately tangentialthereto.

N represents the grinding-rest bolted to and rising from the bed-plateD, and preferably gained out just enough to receive the edge of thestone, as shown in Fig. 1. For the purpose of preventing the stone fromspattering water oif from this grinding-rest when the machine is runningbut not being used, I pro vide a pivoted water-guard O, which is pivotedon a pin P, secured in a bracket S, extending rearwardly from thework-rest M and counterweighted, as shown at Q, so that when theoperator desires to use the machine the guard O readily swings down outof the way and automatically returns to position when released.

With this machine when the operator desires to grind dry, he turns downadj ustingscrew R until the free end of trough U is raised above thewater-level in pan B, when the rotation of the stone soon takes out ofthe trough U all the water therein contained, which is thrown out intopan B. If he desires to use a small amount of water upon the stone, heraises the adjusting-screw R until the free end of trough U comes to thelevel of the water in pan B, when a small amount of water flows intosaid trough and slightly wets the stone. As the stone removes the waterfrom trough U and throws it back into pan B, an equal amount flows overthe end of the trough U, thus keeping the watersupply to the stoneconstant. If more water is desired, the free end of trough U is loweredby raising the adjusting-screw R, thus permitting a larger amount ofwater to flow through the trough U. It is evident that by this means thestone can be kept supplied with a constant amount of water, and this canbe increased or diminished at will.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. In a grinding-machine, the combination, with a stone and means forrotating the same, of a water-pan beneath the stone, and an inneradjustable trough embracing the lower edge of the stone and arranged inthe water-pan below the stone, substantially as and for the purposes setforth.

2. In a grinding-machine, the combination, with a stone and means forrotating the same, of a water-holding pan located beneath the stone, awater-trough arranged within the pan, supplied with water therefrom andpivoted thereto at one end above the water-level in the water-holdingpan, and adjustable mechanism, substantially such as described, foradjusting the free end of the water-trough to different heights in thewater-pan, substantially as described.

3. In a grinding-machine, the combination, with a stone and means forrotating the same, of a water-pan B, carrying the bracket w,water-trough U, pivoted at one end in the pan B, the pivoted lever at,having one arm connected with the free end of trough U, and anadjusting-screw R, governing the other arm of said lever, substantiallyas and for the purposes set forth.

l. In a grinding-machine, a water-guard rising over the stone and havingwatertroughs formed in its depending sides at the upper part of thestone, substantially as shown and described.

5. In a grinding-machine, the combination, with a rotating stone, of awater-guard rising over the stone and having water-troughs formed in itsdepending sides at the upper part of the stone, and a spout it,connected with the troughs for conducting water therefrom, substantiallyas described.

6. In a grinding-machine, the combination, with a stone and means forrotating the same, of a water-guard extending upward and over the stone,a rocking frame pivoted on the end of said water-guard, and a mouth adjustably pivoted to the rocking frame and provided with adischarge-opening having its front formed approximately tangential withthe face of said stone, substantially as and for the purposes set forth.

7. In a grinding-machine, the combination, with a stone and water-guardextending out and over the stone, of a counterweighted lever pivoted tothe end of said water-guard, a screw for adjusting the position of saidlever, and a threaded roll pivoted in said lever, substantially as shownand described.

8. In a grinding-machine, the combination, with a stone andawater-guardextending out and over the stone, of a counterweighted lever pivoted tothe end of said water-guard, a screw for adjusting the position of saidlever,

IIO

a threaded roll pivoted in said lever, and an adjustable mouth extendingover and under said threaded roll, substantially as shown and.

described.

9. In a grinding-machine, the combination, witha stone and means forrotating the same, of a rest for supporting the work, and a pivotedoounterweighted Water-guard normally

